Hyperthyroidism

The thyroid gland plays a central role in regulating the body's metabolic mechanisms; any changes to its function directly impact overall metabolism and physiological health. Hyperthyroidism leads to an accelerated metabolic state. The most prominent symptoms include palpitations, irritability, heat intolerance, hand tremors, and an increased frequency of bowel movements.

Identifying the underlying cause of hyperthyroidism is the essential first step before initiating treatment. While causes can include the accidental ingestion of foods or medications containing thyroid hormones (factitious hyperthyroidism), the majority of cases are due to toxic thyroid nodules or Graves' disease.

Common Causes Include:

1. Graves’ Disease: The most frequent cause, which is an autoimmune disorder where the body's immune system stimulates the thyroid to overproduce hormones.
2. Toxic Thyroid Nodules: Lumps within the thyroid gland that function independently and secrete excessive amounts of hormones.
3. Other Factors: This includes thyroiditis (inflammation) or, in rare instances, excessive intake of thyroid hormones through specific medications or diet.

Among all symptoms, palpitations and tachycardia (rapid heart rate) require the highest level of vigilance. If hyperthyroidism remains uncontrolled for an extended period, the heart is forced to operate in a high-load state for a long duration. This chronic overwork is one of the primary triggers for early-onset heart failure. Therefore, if you experience similar symptoms, a thorough clinical evaluation and blood tests are imperative to ensure long-term cardiovascular safety.

Related symptoms

Diagnostic process

• The examination will vary from person to person, with some requiring only blood drawn and ultrasound, and others requiring further arrangement of absorption photography for evaluation, which will require further discussion with the physician.
• Whether there is exogenous thyroxine uptake or temporary hyperthyroidism caused by infection should be excluded before treatment.
• The treatment after diagnosis is also the part that patients are most worried about and want to know. According to different causes, the treatment is generally divided into three types: antithyroid drugs, surgical resection, radioiodine therapy, etc. Which treatment option is better or worse can be discussed with doctors.

Treatment

Once Graves’ disease is clinically diagnosed, treatment options include radioactive iodine therapy, anti-thyroid drugs, or thyroidectomy. Radioactive iodine is more commonly used in the United States, but the current trend is for the use of antithyroid drugs to gradually increase, and in the absence of other complications, the three treatment options do not differ significantly in quality of life after long-term treatment.

However, there are still some special clinical conditions that make a certain type of treatment more appropriate.

1. Radioactive iodine therapy is indicated for women of childbearing age who do not plan to conceive for at least six months, as well as for patients who face a high risk of surgical complications, have a history of previous neck surgery or radiation therapy, or where an experienced thyroid surgeon is unavailable. It is also recommended for those who have contraindications to antithyroid drugs or are unable to maintain a euthyroid state through medication. Furthermore, radioactive iodine is a suitable treatment option for patients presenting with thyrotoxic periodic paralysis, pulmonary hypertension associated with right heart failure, or congestive heart failure. However, this therapy is strictly contraindicated for women who are currently pregnant or planning to conceive in the near future, as well as for patients with hyperthyroidism complicated by exophthalmos.
2. Antithyroid drugs: For patients with high recovery probability, such as women, with minor diseases, small goiter, negative or low concentration of thyrotropin receptor antibodies (TRAb), pregnancy, older age, or high risk of surgery and a short expected life span, alongside moderate to severe Graves' ophthalmopathy, which need a quick correction of biochemical abnormalities, antithyroid drugs may be considered.
3. Operation: women of childbearing age who are expected to be pregnant for less than half a year have normal thyroid function, compression symptoms or large goiter (more than 80g), relatively low radioiodine absorption, together with suspected or determined to have malignant tumor, the size of thyroid nodules  more than 4cm, hyperparathyroidism required by operation, high concentrations of TRAb and severe active Graves' ophthalmopathy.